<!doctype html>
<head>
  <style>
    :root {
      --brand-color: #0072b0;
      --column-width: 600px;
    }

    body {
      margin: unset;
      background-color: #eee;
      font-family: Helvetica, Arial, sans-serif;
    }

    .page-header {
      color: #fff;
      background-color: var(--brand-color);
    }

    .page-header h1 {
      max-width: var(--column-width);
      margin-inline: auto;
    }

    .container {
      max-width: var(--column-width);
      margin-inline: auto;
      border: 1px dashed gray;
    }

    .expanded-child {
      margin-inline: -2em;
      padding-inline: 2em;
      background-color: #79b;
      overflow: auto;
    }
  </style>
</head>
<body>
  <header class="page-header">
    <h1>Franklin Running Club</h1>
  </header>
  <div class="container">
    <h2>Come join us!</h2>
    <p>
      The <b>Franklin Running Club</b> meets at 6:00pm every Thursday at the
      town square. Runs are three to five miles, at your own pace.
    </p>
    <div class="expanded-child">
      <p>
        Negative margins expand this element outside its container. An equal
        amount of padding brings the content into alignment with the content
        above and below.
      </p>
    </div>
    <p>
      Join us while we train for the
      <a href="/st-patricks">St. Patrick's Day 5k</a>. Don't forget to wear
      green!
    </p>
  </div>
</body>
